Mechanism of shales stabilization by hydrophobized poly(ethylene glycol)/K+ in water-base drilling fluids

VILLABONA-ESTUPIÑAN Santiago,de ALMEIDA RODRIGUES JUNIOR Jorge,de ABREU Carolina Ferreira,NASCIMENTO Regina Sandra Veiga

Table 1. The structure and molecular weights of the shale inhibitors.

Inhibitors Structure Molecular weights/(g•mol-1) PEG2000 2 000 mPEG2000-OA 2 264 OA-PEG2000-OA 2 528